[3.5] Dawn of the Touch-Attack specialist?

[Plane Sailing]

I'm toying with the idea of a new metamagic feat, either called "additional touch" or "lingering touch", to enable a caster to get a second zap from a touch spell.

I've put details in the house rules forum here: http://enworld.cyberstreet.com/showthread.php?s=&postid=1009898

I'd appreciate any feedback on the idea.

Cheers